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学科主题: 生物科学::普通生物学
题名: Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau
作者: Bao, XY (Bao, Xiaoying)1; Zhu, XX (Zhu, Xiaoxue)2; Chang, XF (Chang, Xiaofeng)5; Wang, SP (Wang, Shiping)3, 4; Xu, BRBY (Xu, Burenbayin)2; Luo, CY (Luo, Caiyun)2; Zhang, ZH (Zhang, Zhenhua)2; Wang, Q (Wang, Qi)1, 3; Rui, YC (Rui, Yichao)1; Cui, XY (Cui, Xiaoying)1
通讯作者: Wang, SP
关键词: ORGANIC-MATTER DECOMPOSITION ; MICROBIAL RESPIRATION ; CLIMATE-CHANGE ; SUBSTRATE AVAILABILITY ; SEMIARID GRASSLAND ; THERMAL ADAPTATION ; EXTRACTION METHOD ; SENSITIVITY ; CARBON ; ECOSYSTEM
刊名: PLOS ONE
发表日期: 2016
DOI: 10.1371/journal.pone.0165212
卷: 11, 期:10, 页:e0165212
收录类别: SCI
合作性质: 国内
文章类型: Article
部门归属: 生态
英文摘要: Understanding of effects of soil temperature and soil moisture on soil respiration (Rs) under future warming is critical to reduce uncertainty in predictions of feedbacks to atmospheric CO2 concentrations from grassland soil carbon. Intact cores with roots taken from a full factorial, 5-year alpine meadow warming and grazing experiment in the field were incubated at three different temperatures (i.e. 5, 15 and 25 degrees C) with two soil moistures (i.e. 30 and 60% water holding capacity (WHC)) in our study. Another experiment of glucose-induced respiration (GIR) with 4 h of incubation was conducted to determine substrate limitation. Our results showed that high temperature increased Rs and low soil moisture limited the response of Rs to temperature only at high incubation temperature (i.e. 25 degrees C). Temperature sensitivity (Q(10)) did not significantly decrease over the incubation period, suggesting that substrate depletion did not limit Rs. Meanwhile, the carbon availability index (CAI) was higher at 5 degrees C compared with 15 and 25 degrees C incubation, but GIR increased with increasing temperature. Therefore, our findings suggest that warming-induced decrease in Rs in the field over time may result from a decrease in soil moisture rather than from soil substrate depletion, because warming increased root biomass in the alpine meadow.
语种: 英语
WOS记录号: WOS:000386711100023
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7534
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Peoples R China

Recommended Citation:
Bao, XY ,Zhu, XX ,Chang, XF ,et al. Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau[J]. PLOS ONE,2016,11(10):e0165212.
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